Material for phonograph record blanks and process of making the same



'Apr.-3, .1923.

1, 450,739 J. .P.. ELLIOTT MATERIAL FOR *PHONOGRAPH RECORD BLANK S ANDPROCESS QF MAKI NG THE SAME Filed Spt. 15, 1920 Patented Apr. 3, 1923.

UNITED STATES PATIENT OFFICE.

JAMES P. ELLIOTT, OF CHICAGO, ILLINOIS; MARY BRODEES ELLIOTT EXECUTE/IXOF I SAID JAMES P. ELLIOTT, DECEASED.

MATERIAL FOR PHQNOGRAPH RECORD BLANKS AND PROCESS OF MAKING THE SAME.

Application filed September 15, 1920. 'Serial No. 410,425.

To all whom/it may concern:

Be it known that I, JAMEs P. ELLIOTT, a citizen of the United States,residing at Chicago, county of Cook, State of Illinois, hfiNe invented acertain new and useful Im- 'provement in Materials for Phonograph RecordBlanks and Process of Making the Same, and declare the following to be afull, clear, and exact' description of the same, such as will enableothers skillediH the art to which it pertains to make and use the same,reference being had to the accompanying drawings, which form apart ofthis specification.

The materials out of which phonograph disc records are made arecomparatively brittle so that the records break easily unless they aremade quite thick. The composition employed in making the records iscostly so that thickening the blanks to guardagainst accidental fractureis an expensive expedient; v The object of the present invention is toproduce a composite sheet or body adapted for, use in making phonographrecords, which sheet or body shall possess all of the desirablequalities of the usual blanks and at the same time be practicallyunbreakable in ordinary use and much cheaper than heavy records of theusual material would be.

In accordance with my invention I build up a composite sheet or body outof a layer or layers of fibrous material impregmated with asphalt, pitchor other material which is cement-itious when heated and more or lesshard at ordinary or room tempera.- tures and a layer or layers ofordinary .record blank material; the same being united, and preferablycompacted into a single rigid sheet having one or both faces coveredwith i the usual record composition. My improved product may thereforebe used in making single or double faced records in the usual way but,by reason of the presence of the core, will be tough and not easilybroken.

The various feature s of novelty. whereby my invention is "characterizedwill hereinafter be pointed out with particularity in the claims; but,for'a full understanding of my invention and of its objects andadvantages, reference may ,be had to the following detailed descriptiontaken in connection with the accompanying drawings, wherein:

Figure 1 is a cross section through asheer pleted sheet.

'In carrying out my invention .I employ a sheet or body, 1, as indicatedin Fig. 1 of'the drawing, which is preferably made in accordance withthe disclosure of my prior Patent 1,305,081, the process of tlieaforesaid patent being stopped after the completion of a fibrous sheetcontaining the asphalt,'pitch or other cementitious material in apowderyor other .comminuted form. If a product adapted for making only singlefaced records is desired, there is laid upon the sheet, 1, a thin layeror sheet, 2, of the usual record c0mposition.- If a product adapted formaking double faced records is desired, a second sheet or layer, 3,similar to the sheet or layer 2, is laid against the opposite side ofthe sheet 1. The group of sheets or layers is then subjected to heat andpressure, causing the comminuted cementitious material to fuse or meltand distribute itself uniformly throughout the sheet or layer 1, thepressure serving to force the sey eral sheets or layers firmly togetherand, if desired. compacting the core sheet or layer to any desireddegree; the final product being that illustrated in Fig. 2 wherein thecore layer, if the cementitious material be asphalt or pitch, hasassumed substantially the appearance of hard rubber. During the heatingand pressing operation the cementitious material, in its moltencondition, is forced into intimate contact with the layer or layers ofrecord composition and causes ..the several layers tobe united into asingle rigid body.

The fibrous material in the core layer may take any desired form, but ispreferablycompose'd of long fibers since such fibers will make thematerial tougher than if extremely short fibers are employed.

While I have illustrated and described with particularity only a singlepreferred form of my invention, I do not desire to be limited to theexact structural details 'thus illustrated and described; butintend tocover all forms and arrangements which come within the terms employed inthe definitions of my invention constituting the appended claims.

I claim:

1. The method of making material phonograph record blanks which consistsin laying a layer of phonograph record composition upon a porous layerof fibrous material containing in a powdered or granular form a binderwhich is cementitious when heated, and then applying heat sufficient tocause the binder to become cementi-- tious and presure suflicient tocause the layer containing the binder to become compacted and united tothe other layer.

2. The method of making material for phonograph 'record blanks whichconsists in laying a layer of phonograph record composition upon afibrous layer containing bltuminous material in a powdered orgranularform. and then for' applying heat to fuse the bituminous material andcause it to spread itself uniformly through the fibrous layer andpressure sufficient to condense and compact the latter layer and uniteit to the other layer.

3. The method of making material for phonograph record blanks whichconsists in applying a layer of phonograph record c0mposition upon abody of bituminous material in the form of small individual particleshaving fibers distributed throughout the same, then applying heat andpressure to fuse the bituminous material, compact the same and unite itwith the aforesaid composition.

4. A phonograph record body comprising layer of bituminous materialhaving reinforcing fibers extending through the same united to a layerof phonograph record composition.

In testimony whereof. I sign this specification.

J AMES P. ELLIOTT.

